无法使用视图名称“图书详细信息”解析超链接关系的URL。

Question

以前我使用的是ModelSerializer，没有错误。当我用HyperlinkedModelSerializer替换它时，这个错误被抛出

Could not resolve URL for hyperlinked relationship using view name "book
detail". You may have failed to include the related model in your API,
or incorrectly configured the `lookup_field` attribute on this field.

这是serializers.py文件：

class BookSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Book
        fields = ['id', 'url', 'title', 'subtitle', 'isbn']

model.py

class Book(models.Model):
    title = models.CharField(max_length=250)
    subtitle = models.CharField(max_length=250)
    author = models.CharField(max_length=100)
    isbn = models.CharField(max_length=13)

    def __str__(self):
        return self.title

views.py

class BookListView(viewsets.ModelViewSet):
    queryset = Book.objects.all()
    serializer_class = BookSerializer

和urls.py

router = routers.DefaultRouter()
router.register('books', BookListView)


app_name = "books"
urlpatterns = [
    path('', include(router.urls)),
]

视图名称book-detail在我的视图中不存在，可能Django是自动创建的，我不知道在哪里找到和调试它？谢谢。

这是错误的回溯-

Environment:


Request Method: GET
Request URL: http://localhost:8000/books/

Django Version: 3.1.2
Python Version: 3.8.5
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'rest_framework',
 'books.apps.BooksConfig']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\relations.py", line 398, in to_representation
    url = self.get_url(value, self.view_name, request, format)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\relations.py", line 336, in get_url
    return self.reverse(view_name, kwargs=kwargs, request=request, format=format)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\reverse.py", line 47, in reverse
    url = _reverse(viewname, args, kwargs, request, format, **extra)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\reverse.py", line 60, in _reverse
    url = django_reverse(viewname, args=args, kwargs=kwargs, **extra)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\django\urls\base.py", line 87, in reverse
    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\django\urls\resolvers.py", line 685, in _reverse_with_prefix
    raise NoReverseMatch(msg)

During handling of the above exception (Reverse for 'book-detail' not found. 'book-detail' is not a valid view function or pattern name.), another exception occurred:
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\django\core\handlers\base.py", line 179, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\django\views\decorators\csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\viewsets.py", line 125, in view
    return self.dispatch(request, *args, **kwargs)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\views.py", line 480, in raise_uncaught_exception
    raise exc
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\mixins.py", line 46, in list
    return Response(serializer.data)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\serializers.py", line 745, in data
    ret = super().data
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\serializers.py", line 246, in data
    self._data = self.to_representation(self.instance)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\serializers.py", line 663, in to_representation
    return [
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\serializers.py", line 664, in <listcomp>
    self.child.to_representation(item) for item in iterable
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\serializers.py", line 515, in to_representation
    ret[field.field_name] = field.to_representation(attribute)
  File "D:\All\Back-end Django\REST API Django\lib\site-packages\rest_framework\relations.py", line 413, in to_representation
    raise ImproperlyConfigured(msg % self.view_name)

Exception Type: ImproperlyConfigured at /books/
Exception Value: Could not resolve URL for hyperlinked relationship using view name "book-detail". You may have failed to include the related model in your API, or incorrectly configured the `lookup_field` attribute on this field.

Answer 1

我也曾面临过这个问题，但我通过这样做解决了问题：

urls.py (项目)

您可能需要在根urls.py中为应用程序提供命名空间。

path('your_url', include(('your_app.urls', 'your_app'), namespace="your_app"))

serializers.py

添加一个HyperlinkedIdentityField

class BookSerializer(serializers.HyperlinkedModelSerializer):
    # add this 
    url = serializers.HyperlinkedIdentityField(view_name="your_app:book-detail")

    class Meta:
        model = Book
        fields = ['id', 'url', 'title', 'subtitle', 'isbn']

urls.py (app)

添加basename

router = routers.DefaultRouter()
# add basename
router.register('books', BookListView, basename="books")

Docs https://www.django-rest-framework.org/tutorial/5-relationships-and-hyperlinked-apis/